First, we present a theory of multipolar ordering phenomena in the Kondo material with a non-Kramers doublet, Pr TM 2Al20 . Arthur Ernst Johannes Kepler Universitat Linz, Max-Planck-Institut fur Mikrostrukturphysik It is a well known fact that a magnetic field can break the time reversal symmetry and therewith can destroy a topologically protected surface state in topological insulators. Under a small magnetic field, the magnon bands of the pyrochlore with AIAO background can feature two opposite-charged Weyl points, which is the minimal number of Weyl points realizable in quantum materials and has not be experimentally observed so far. Thermoelectric power generation is one of the important techniques to obtain electricity from various types of heat surrounding us, i. However, the interplay between magnetism and topological order can yield a number of interesting phenomena such as the quantum anomalous Hall effect, a topological magneto-electric effect, and quantized Kerr- or Faraday rotation.
In Dirac semimetals DSM , e. What is perhaps less well known, is that physics in the lab and cosmos remain just as intertwined as they were a hundred years ago. Wenxing Nie Sichuan University, China In this talk, I will introduce our recent work about the investigation of novel topological magnon band crossings in pyrochlore antiferromagnets with all-in-all-out AIAO magnetic order. Under a small magnetic field, the magnon bands of the pyrochlore with AIAO background can feature two opposite-charged Weyl points, which is the minimal number of Weyl points realizable in quantum materials and has not be experimentally observed so far. First principle calculation for the off-diagonal part of electric and thermoelectric tensors agrees with the experimental result, which suggests that first principle calculation is strong to explore new materials having large ANE. The transition is induced by an easy plane single-ion anisotropy D. However, the nature of the paramagnetic ground state in this material remains highly debated, primarily owing to the difficulty in revealing the intrinsic magnetic behaviour of the kagome lattice from defect contributions. Secondly, we provide a theory of quantum spin liquid phase in the newly discovered Kitaev material, the hydrogen-intercalated honeycomb iridate, H3LiIr2O6 . B 81, R ; Z. Most importantly, we demonstrate that the low- temperature behaviour of the intrinsic spin susceptibility provides direct evidence for a QSL state with a small energy gap in ZnCu3 OH 6Cl2 . Possible avenues for future research in these systems will be discussed. T are appreciate the financial support from JSPS. Specifically, we find that the Ising Jz component of the Heisenberg exchange creates an attraction between magnons in the paramagnetic phase and binds magnons into a two-particle bound state. B 82, The band structure calculation of TaP tells us that besides the normal bands, two types of Weyl points appear. In this talk, I will show a few examples of nonlinear optical effects that have topological origins. In this talk, I would like to introduce a strategy to explore materials having large ANE. Wenxing Nie Sichuan University, China In this talk, I will introduce our recent work about the investigation of novel topological magnon band crossings in pyrochlore antiferromagnets with all-in-all-out AIAO magnetic order. Finally, I discuss that another second-order nonlinear effect, circular photogalvanic effect CPGE , is governed by Berry curvature and measuring CPGE in Weyl semimetals allows an access to monopole physics of Weyl fermions . From this band structure one can easily imagine that he conventional Korringa process is valid in well below emperature corresponding to the W2 energy, while increasing temperature excitations at the W2 Weyl nodes become progressively dominant. A kinetically arrested spin liquid", Dr. Because of the ubiquitous AIAO orders in pyrochlore magnets including R2Ir2O7, and experimentally achievable external strain and magnetic field, our predictions provide promising arena to witness the Weyl magnons in quantum magnets. The chiral liquid phase is characterized by a finite vector chirality without long range dipolar magnetic order. Arguably the most topical of the new classes of material are Dirac- and Weyl-semi metals which are predicted to host topologically protected states in the bulk. We corroborate our analytic treatment with a numerical analysis and show evidence of the chiral phase by means of the density matrix renormalization group calculations.
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